Bezzera BZ13 slow build up of brew pressure

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erwinseow
Posts: 18
Joined: July 6th, 2015

Postby erwinseow » Sep 14, 2017, 1:55 am

Hi all,

Recently I am very some problem with my 2 year old BZ13.

Please watch this.

http://www.youtube.com/watch?v=UVyq7lwiIKk

The brew pressure build up is very slow. Any clues on what the problem is? Is it a dying pump?

Also in the past, after u press the button after the shot is pulled, the manometer needle will jump back to 0 almost immediately. But now it just moves back slowly.

Thanks in advance.

Erwin.

User avatar
another_jim
Team HB
Posts: 10279
Joined: May 5th, 2005

Postby another_jim » Sep 14, 2017, 2:23 pm

It sounds like the pump is fine; it looks like the gauge is slow.

erwinseow
Posts: 18
Joined: July 6th, 2015

Postby erwinseow » Sep 15, 2017, 9:35 am

another_jim wrote:It sounds like the pump is fine; it looks like the gauge is slow.


You are right. I just replaced the pump and the problem is still there.

What are the possible issues?

1) Faulty gauge?
2) Solenoid Valve?

advice needed!

Thanks!
Erwin

DeGaulle
Posts: 216
Joined: January 17th, 2014

Postby DeGaulle » Sep 15, 2017, 10:39 am

My guess is it's the gauge. If your solenoid valve were sticky, I would still expect to see a instant drop to zero, albeit delayed. (Water is incompressible, so the pressure will instantly diminish even at a partly open exhaust port of the solenoid.)
Bert

erwinseow
Posts: 18
Joined: July 6th, 2015

Postby erwinseow » Sep 15, 2017, 11:25 am

Hi all,

Thanks for the suggestion.

If I were to take out the pressure gauge. Can I service it or do I need to replace it?

Thanks!

Erwin

DeGaulle
Posts: 216
Joined: January 17th, 2014

Postby DeGaulle » Sep 15, 2017, 11:41 am

I am not sure what you could possibly do to service the gauge. It is basically a needle that moves with the compression force of a spring that balances the brew pressure. I would replace it.
Bert

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slipchuck
Posts: 340
Joined: April 12th, 2017

Postby slipchuck » Sep 15, 2017, 11:57 am

erwinseow wrote:Hi all,

Recently I am very some problem with my 2 year old BZ13.

Please watch this.

http://www.youtube.com/watch?v=UVyq7lwiIKk

The brew pressure build up is very slow. Any clues on what the problem is? Is it a dying pump?

Also in the past, after u press the button after the shot is pulled, the manometer needle will jump back to 0 almost immediately. But now it just moves back slowly.

Thanks in advance.

Erwin.

Besides the gauge, how do you like your Bezzera?
The only bad decisions are the decisions you didn't make

erwinseow
Posts: 18
Joined: July 6th, 2015

Postby erwinseow » Sep 15, 2017, 6:36 pm

slipchuck wrote:Besides the gauge, how do you like your Bezzera?


It rocks! Compact in size and warms up extremely fast. I had had it for 2 years+ and have pulled thousands of shots with it. I use it in an office environment and so far so good.

The only issue that I had so far was the joystick of the steamwand. The design is very simple made the parts worn out with high usage. So I replaced the worn parts. Quite easy if you are a hands on person.

Love it!

erwinseow
Posts: 18
Joined: July 6th, 2015

Postby erwinseow » Sep 20, 2017, 8:18 am

Hi all,

How do I know that this problem is not due to the OPV?

Thanks in advance!

Erwin

DeGaulle
Posts: 216
Joined: January 17th, 2014

Postby DeGaulle » Sep 20, 2017, 3:31 pm

A sticky OPV due to some deposit is not an uncommon glitch, but it usually shows as pressure oscillations, not a slower ramp up or ramp down per se.
Bert

 
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